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Eliminated the MemAccessInst class, folding contents into GEP class.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3487 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-08-22 23:37:20 +00:00
parent d145c2172f
commit cc63f1c674
13 changed files with 114 additions and 184 deletions
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20
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -76,25 +76,11 @@ namespace {
static inline bool isSafeAlloca(const AllocaInst *AI) {
if (AI->isArrayAllocation()) return false;
// Only allow direct loads and stores...
for (Value::use_const_iterator UI = AI->use_begin(), UE = AI->use_end();
UI != UE; ++UI) { // Loop over all of the uses of the alloca
// Only allow nonindexed memory access instructions...
if (MemAccessInst *MAI = dyn_cast<MemAccessInst>(*UI)) {
if (MAI->getPointerOperand() != (Value*)AI)
return false; // Reject stores of alloca pointer into some other loc.
if (MAI->hasIndices()) { // indexed?
// Allow the access if there is only one index and the index is
// zero.
if (*MAI->idx_begin() != Constant::getNullValue(Type::UIntTy) ||
MAI->idx_begin()+1 != MAI->idx_end())
return false;
}
} else {
UI != UE; ++UI) // Loop over all of the uses of the alloca
if (!isa<LoadInst>(*UI) && !isa<StoreInst>(*UI))
return false; // Not a load or store?
}
}
return true;
}